Joye 510 or KR808D-1 (in colors aka Vapor King at vapor4Life.com) are great starting units
And if you get 510 I recommend you get a Joye 510 for your first because they are the original manufacturer and there are some substandard clone parts around.
And if you decide on KR8 then I think Vapor4Life is still having 30% off on orders over $60 with code SuperSale30
Comparison
http://www.e-cigarette-forum.com/fo...st-electronic-cigarette-first-time-vaper.html
KR8 seems a bit thicker and its standard size battery (not the shorty or xl) lasts the longest of all approx 120mm minis because more of its length is battery (510 is a 3-piece and part of 510's length is atomizer). Both are good choices and eventually I ended up with both.
For either I recommend a PCC (a personal charging case) so you can charge a battery on the go while using another. For all day at work I use a charger but when out I use a PCC.
Re juices - people all have their own faves. Some popular ones I like are FreedomSmokeUSA.com (my faves are caramelley sweet oRYental 4, Vanilla Tahity and Chocolate for mixing in other flavors, Desert Ship as an analog-alike, and their new Voodoo is really interesting). and Backwoods Brew (my faves there have been all-day vapes - Casablanca and Vanilla Bean).
I also like Velvet Vapors (I love their sweet vanilla almond tobacco which is mostly sweet rich vanilla, and their Raspberry Ginger Ale).